[blykins]

There's a point of diminishing returns with carburetors.

You want them to: 1. be infinitely tunable 2. make horsepower

You have base level carbs such as your Edelbrocks, Street Avengers, etc., that are pretty bland as far as points 1 and 2 go. Then you have upgrades, such as your Quick Fuels, HP Holleys, AED's, etc. After you get to that point, it takes a tuner and an engine dyno/chassis dyno to make sure you're getting what you need to get and to see if you can squeeze some more out if necessary.

None of them are going to be dead-on without tinkering, especially when sending carbs or engines across different climate zones, with different qualities of pump gas, etc.

We've had Braswell send carbs here, then we gained 20 hp on an engine dyno by making corrections. Gotta have a savvy carb guy in your vacinity, reading numbers, reading plugs, to get the best results.